EP0019979B1 - Désagrégateur pour une drague aspirante - Google Patents

Désagrégateur pour une drague aspirante Download PDF

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Publication number
EP0019979B1
EP0019979B1 EP80200493A EP80200493A EP0019979B1 EP 0019979 B1 EP0019979 B1 EP 0019979B1 EP 80200493 A EP80200493 A EP 80200493A EP 80200493 A EP80200493 A EP 80200493A EP 0019979 B1 EP0019979 B1 EP 0019979B1
Authority
EP
European Patent Office
Prior art keywords
cutter
cutting
nozzles
soil
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80200493A
Other languages
German (de)
English (en)
Other versions
EP0019979A1 (fr
Inventor
Johan Hendrik Volbeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HOLLANDSCHE AANNEMING BV Mij
Original Assignee
HOLLANDSCHE AANNEMING BV Mij
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HOLLANDSCHE AANNEMING BV Mij filed Critical HOLLANDSCHE AANNEMING BV Mij
Publication of EP0019979A1 publication Critical patent/EP0019979A1/fr
Application granted granted Critical
Publication of EP0019979B1 publication Critical patent/EP0019979B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
    • E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
    • E02F3/9231—Suction wheels with axis of rotation parallel to longitudinal axis of the suction pipe
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
    • E02F3/9218—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with jets

Definitions

  • the invention relates to a rotatably-driven cutter for a suction dredger, the cutter having a plurality of cutting blades capable of cutting loose the soil which, mixed with water is subsequently sucked up by means of a suction tube, and nozzles provided on the cutting blades for ejecting fluid jets against and into the soil layer to be cut loose.
  • a rotatably-driven cutter for a suction dredger having a plurality of cutting blades capable of cutting loose the soil which, mixed with water is subsequently sucked up by means of a suction tube, and nozzles provided on the cutting blades for ejecting fluid jets against and into the soil layer to be cut loose.
  • Such cutter is known from US Patent Specification 4022028.
  • the known cutter forms a part of a submarine pipeline trenching apparatus and comprises a base ring mounted for rotating in a base support and a plurality of curved cutter blades affixed to said base ring and extending upwardly to an upper ring to which the upper end of each cutter blade is also secured.
  • a jet tube is mounted inwardly of and extends along each cutter blade, said jet tube having a right angle portion at its upper end for the discharge of jetting fluid therefrom in a direction to facilitate the cutting or digging action by the cutter blades.
  • a cutter for a suction dredger in which a nozzle for ejecting fluid jets is formed at the end of the hollow driving shaft of the cutter or at the ends of two separate pipes which extend on both sides of the cutter parallel to the driving shaft, said fluid being introduced into the soil in order to reduce the cutting forces that are needed for the cutting of the soil.
  • each fluid jet ejected through a nozzle has to pass over a relative great distance through the ambient water before it strikes against the soil, so that at that moment the jet has lost a great deal of its impetus and will now be capable to break solid e.g. clayey soils. Therefore this arrangement is only suitable for sandy soils of which the pores are filled with water.
  • the object of the invention is to provide a cutter in which the nozzles are arranged so that the fluid jets ejected from the nozzles will also be capable to cut loose or fragmentate solid clayey soils.
  • the cutter in accordance with the invention in which the or each nozzle is located on the rear side of the respective cutting blade rearwardly of its leading cutting edge, the nozzles being outwardly directed so that the fluid jet ejected from the nozzle or nozzles of a cutting blade pretreats the soil portion to be cut loose by the following cutting blade.
  • the portion of the soil to be cut loose by a cutting blade is either fluidized (when it has a comparatively high sand content) or cut into pieces (when it has a high clay content) so that the fluid is present in every place where deformations in the soil occur as a result of the cutting action.
  • the mixing of soil and water will be advanced.
  • the nozzles are advantageously in communication with channels which extend through or along the cutter blades, at least one closed chamber in the form of a circular arc being provided in which opens a stationary pipe for the supply of the fluid under pressure and of which one wall is formed by the end face of a rotatable, substantially annular member to which the cutting blades are connected and through which extend the ends of the channels, so that during rotation of the cutter said channels are permitted to communicate with said chamber.
  • the chamber is constructed in the form of a circular arc it is achieved that during rotation of the cutter a fluid is ejected only through those nozzles which are directed towards the soil and not through the remaining nozzles so that the full fluid pressure can be used for the cutting and/or fluidization of the soil and the formation of said mixture will not be disturbed.
  • the cutter head When cutter dredgers are in operation, the cutter head is also swung in one direction and the other, i.e. in the one direction of the swinging motion the cutter head rotates in the same direction and in the other direction of the swinging motion the cutter head rotates in opposite direction; this means that when the direction of swinging motion is changed fluid should be supplied to the nozzles at another region.
  • two or more chambers in the form of a circular arc are provided which chambers can be communicated individually with the fluid supply tube.
  • a fluid is introduced into the soil only at the region where during the cutting action of the blade a shear plane is being formed, a shear plane being the plane along which during the cutting action the soil is loosened from the soil still untouched.
  • the fluid is introduced into the soil by means of oblique, perforated tubes extending in the direction of the shear plane and penetrating into the ground.
  • the cutter comprises a rotatable hub 1, a rotatable ring 2, and a number of helical cutter blades 3, one of which being illustrated, which are secured to the hub 1 at their one side and to ring 2 at their other side.
  • a channel 4 extends through each cutter blade, which channel is closed at the side of the ring and opens at the side of the hub (Fig. 5) so that from this place a fluid under pressure can enter into channel 4.
  • channel 4 is closed at the side of the hub 1 and opens at the side of the ring 2 (Fig. 3).
  • a plurality of spaced apart connecting passages 5 are drilled out in each cutting blade, said passages connecting channel 4 with nozzles 6.
  • the spacings may correspond with the distances between the teeth or with portions thereof, as in the case of a cutter, of which the blades are provided with teeth instead of with a continuous cutting edge, as illustrated in the drawing.
  • each cutter blade e.g. cutter blade 3' will cut off a fluidized or fragmented portion of the soil, which is defined by the broken line 8. In this way, the requisite cutting forces are considerably reduced.
  • the cutter illustrated in Fig. 3 and 4 comprises a hub 9 which is fixed to the end of driving shaft journaled on a bearing 10, and a ring 11.
  • the cutting blades 12, which are only schematically shown, are identical to those illustrated in Fig. 1 and 2.
  • the cutter comprises a shield construction 13 which is secured to the bearing 10, a distribution ring 14 being mounted on said shield construction.
  • An annular chamber 15 is formed between the distribution ring 14 and ring 11, said chamber being also defined by the packings 16.
  • the channels extending through the cutter blades 12 and being indicated in Fig. 1 and 2 by reference numeral 4 are closed on the side of the hub 9. Said channels extend through ring 11 (illustrated by reference numeral 17) so that they open in chamber 15.
  • the chamber 15 is divided by sealing members 18 into three sections, of which the sections 15' and 15" can be brought individually into communication with pipes 19 and 19' for introducing a fluid under pressure into the respective chamber sections 15' and 15".
  • the fluid under pressure will flow to nozzles disposed on the cutter blades only through those channels 17 which move past chamber section 15' or 15" which is in communication with pipe 19, the one chamber section 15' and the other chamber section 15" being in a position such that the cutter blades moving past said chamber sections are the ones which perform the actual cutting action when the cutter swings in the one direction and the other direction respectively.
  • a valve system (not illustrated) the communication of pipe 19 with the chamber sections can be changed from the one chamber section to the other.
  • Said system may be operated by the direction of rotation of the hauling winches, i.e. by the winches which make the cutter swing.
  • Fig. 5 is a side view of the cutter illustrated in Fig. 1 and 2, in which the cutting blades 3 are only schematically shown.
  • the bearing construction 20 for mounting the shaft which drives the hub 1 and a shield construction 21.
  • An annular body 22 is provided on the bearing construction 20, an annular chamber 23 being formed in said annular body and said chamber 23 being divided into three sections by sealings in the same way as illustrated in Fig. 4.
  • the chamber sections of the annular chamber 23, corresponding to the sections 15' and 15" illustrated in Fig. 4 can be brought into communication with a source for a fluid under pressure via pipe 24.
  • Each one of the channels 4 provided in the cutting blades opens in a pipe 25 disposed along the hub 1 so that in the same way as described hereinabove for the cutter shown in Figures 3 and 4, the fluid under pressure will flow to the nozzles mounted on the cutting blades only through the channels 4 of those cutting blades 3 which perform the actual cutting action.
  • annular body 22 and annular chamber 23 could also be disposed at any location along the driving shaft outside the cutter in which case each one of the channels 4 provided in the cutting blades does not open in a pipe 4 as shown in Fig. 5, but in a channel or passage provided in the driving shaft and hub 1 and extending from annular chamber 23 to channel 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Claims (3)

1. Organe de coupe entraîne en rotation pour drague à aspiration, comportant une pluralité de lames de coupe (3) susceptibles de trancher le matériau du sol qui, mélangé à de l'eau, est ensuite aspiré au moyen d'un tube d'aspiration, et des buses (6) réalisées sur les lames de coupe pour diriger des jets de fluide contre et dans la couche de sol à trancher, caractérisé par le fait que la ou chacune des buses (6) est placée sur le côté arrière de la lame de coupe (3) correspondante, en arrière de son bord de coupe de tête, les buses étant dirigées vers l'extérieur de telle manière que le jet de fluide projeté par la ou les buses d'une lame de coupe (3) prétraite la partie du sol (7) à trancher par la lame de coupe suivante (3').
2. Organe de coupe selong la revendication 1, caractérisé par le fait que lesdites buses (6) sont en communication avec des canaux (4) qui s'étendent à travers ou le long des lames de coupe et qu'il est prévu au moins une chambre fermée (15, 23) en forme d'arc circularie dans laquelle débouche un conduit fixe (19, 24) pour l'alimentation en fluide et dont une paroi est formée par la face d'extrémité d'un élément rotatif sensiblement annulaire (11, 1) auquel sont reliées les lames de coupe et à travers lequel s'étendent les extrémités (17, 25) des canaux de telle sorte que, pendant la rotation de l'organe de coupe, lesdits canaux peuvent
communiquer aved ladite chambre.
3. Organe de coupe selon la revendication 2, caractérisé par le fait qu'il comprend deux chambres ou plus (15', 15", 23) sous forme d'un arc circulaire qui, selon le sens d'un mouvement oscillant de l'organe de coupe, peuvent être amenées individuellement en communication avec le conduit d'alimentation en fluide (19; 24).
EP80200493A 1979-05-28 1980-05-22 Désagrégateur pour une drague aspirante Expired EP0019979B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7904177 1979-05-28
NL7904177A NL7904177A (nl) 1979-05-28 1979-05-28 Werkwijze voor het baggeren van onder water gelegen grondmateriaal en een inrichting voor het uitvoeren van de werkwijze.

Publications (2)

Publication Number Publication Date
EP0019979A1 EP0019979A1 (fr) 1980-12-10
EP0019979B1 true EP0019979B1 (fr) 1983-05-25

Family

ID=19833260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200493A Expired EP0019979B1 (fr) 1979-05-28 1980-05-22 Désagrégateur pour une drague aspirante

Country Status (5)

Country Link
US (1) US4327507A (fr)
EP (1) EP0019979B1 (fr)
CA (1) CA1140166A (fr)
DE (1) DE3063447D1 (fr)
NL (1) NL7904177A (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8104796A (nl) * 1981-10-22 1983-05-16 Stichting Speurwerk Baggertech Werkwijze en inrichting voor het baggeren van rots.
DE3434976A1 (de) * 1984-09-24 1986-04-03 Basf Ag, 6700 Ludwigshafen Thermoplastische formmassen
US4793740A (en) * 1986-11-28 1988-12-27 Foundation Constructors Drilling system
US4958962A (en) * 1989-06-28 1990-09-25 Halliburton Company Methods of modifying the structural integrity of subterranean earth situs
GB2247261A (en) * 1990-08-20 1992-02-26 British Gas Plc Method and tool for seabed excavation
US5396964A (en) * 1992-10-01 1995-03-14 Halliburton Company Apparatus and method for processing soil in a subterranean earth situs
BE1011744A4 (nl) * 1998-02-13 1999-12-07 Dredging Int Werkwijze voor het doorheen grond-en rotslagen werken met bagger-of graafwerktuigen en volgens deze werkwijze werkende inrichtingen.
US6578294B2 (en) 2001-02-02 2003-06-17 Esco Corporation Dredge cutterhead
BE1015565A3 (nl) * 2003-06-13 2005-06-07 Dredging Int Inrichting en werkwijze voor het losmaken en winnen van baggermateriaal.
BE1016461A3 (nl) * 2005-02-22 2006-11-07 Dredging Int Snijkop voor het baggeren van grond en werkwijze voor het baggeren met behulp van deze snijkop.
NL1031253C2 (nl) * 2006-02-28 2007-08-29 Vosta Lmg Bv Snijkop met verbeterde opbrengst, alsmede snijkopzuiger voorzien van een dergelijke snijkop.
US7883295B2 (en) * 2008-04-10 2011-02-08 Schellhorn Verne L Method and apparatus for forming an in situ subterranean soil cement structure having a cyclonic mixing region
NL2018916B1 (en) * 2017-05-15 2018-11-23 Ihc Holland Ie Bv Cutter head with skirt
NL2019004B1 (en) * 2017-05-31 2018-12-07 Dredge Yard Dmcc A cutter head with suction function and a method for using same
EP3543408B1 (fr) * 2018-03-21 2020-10-21 BAUER Spezialtiefbau GmbH Engin de fraisage pour creuser des tranchées dans le sol et procédé de creusage des tranchées dans le sol
CN114215134A (zh) * 2021-12-30 2022-03-22 中交疏浚技术装备国家工程研究中心有限公司 一种强力破碎绞刀
CN118087643B (zh) * 2024-04-17 2024-07-16 江苏航宇环境科技有限公司 一种疏浚环保装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US725818A (en) * 1900-10-19 1903-04-21 Lindon Wallace Bates Cutter for suction-dredges.
US725817A (en) * 1900-10-19 1903-04-21 Lindon Wallace Bates Cutter for dredges.
GB1109247A (en) * 1966-08-17 1968-04-10 Vnii Nerudnykh Str Materialov Cutter/suction devices for dredgers
AT281904B (de) * 1968-07-16 1970-06-10 Atlas Copco Mct Ab Einrichtung zur Messerkühlung bei Tunnel- bzw. Stollenvortriebsmaschinen, Gewinnungsmaschinen od.dgl.
DE1941993B2 (de) * 1969-08-18 1972-03-23 Vorrichtung zum einspuelen von bauelementen
GB1309005A (en) * 1970-07-24 1973-03-07 Coal Industry Patents Ltd Rotary cutters for mineral mining machines
US4022028A (en) * 1971-12-23 1977-05-10 Martin Charles F Submarine pipe trenching apparatus
IT946582B (it) * 1972-01-14 1973-05-21 Saipem Spa Dispositivo per scavare una trin cea al disotto di una tubazione sommersa e relativo metodo d im piego
NL158875B (nl) * 1973-06-04 1978-12-15 Stichting Speurwerk Baggertech Werkwijze en inrichting voor het baggeren.
NL7408623A (en) * 1974-06-26 1975-12-30 Ihc Holland Nv Suction dredger cutter head - has water jets aimed at area adjacent to where cutter is working
SU610993A1 (ru) * 1976-11-30 1978-06-15 Государственный Проектно-Конструкторский Институт Угольного Машиностроения Шнековый исполнительный орган угольного комбайна

Also Published As

Publication number Publication date
US4327507A (en) 1982-05-04
CA1140166A (fr) 1983-01-25
DE3063447D1 (en) 1983-07-07
NL7904177A (nl) 1980-12-02
EP0019979A1 (fr) 1980-12-10

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